This is no longer an issue in Feisty.
** Changed in: linux-source-2.6.17 (Ubuntu)
Status: Needs Info => Fix Released-- snd-ice17xx dmix crackles whereas plughw does not https://launchpad.net/bugs/75838 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
